WO2005090081A1 - 液滴配置装置及び液滴配置方法 - Google Patents
液滴配置装置及び液滴配置方法 Download PDFInfo
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- WO2005090081A1 WO2005090081A1 PCT/JP2005/003514 JP2005003514W WO2005090081A1 WO 2005090081 A1 WO2005090081 A1 WO 2005090081A1 JP 2005003514 W JP2005003514 W JP 2005003514W WO 2005090081 A1 WO2005090081 A1 WO 2005090081A1
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- Prior art keywords
- substrate
- light
- liquid
- inkjet head
- receiving element
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
- B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
- B41J2/04586—Control methods or devices therefor, e.g. driver circuits, control circuits controlling heads of a type not covered by groups B41J2/04575 - B41J2/04585, or of an undefined type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
- B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
- B41J2/04556—Control methods or devices therefor, e.g. driver circuits, control circuits detecting distance to paper
Definitions
- the present invention relates to a liquid placement device and a liquid placement method using an inkjet.
- an ink jet printer has been widely used as a printer for printing characters and images, and has also been used as an electronic device and a device for producing a deoxyribonucleic acid (DNA) chip.
- the electronic device refers to an element or an aggregate thereof that performs calculations, accumulates and transmits information, and displays information by utilizing the flow and accumulation of electrons. Examples of these are electric circuits, wiring, electrodes, resistors, capacitors, semiconductor elements, and the like that make up these circuits.
- the printing mechanism of an ink-jet printer is based on a number of through-holes (hereinafter referred to as “nozzle holes”) with a diameter of several tens / zm formed on a flat plate (hereinafter referred to as “nozzle plate”).
- nozzle holes a number of through-holes
- nozzle plate a flat plate
- Ink is ejected toward a printed body such as paper, and the ejected ink is arranged at a predetermined position on the printed body.
- the ink is ejected while mechanically driving the positions of the nozzle plate and the printing body to control their relative positions.
- the method of discharging a liquid (also referred to as a liquid droplet) from a nozzle hole of a nozzle plate and arranging the liquid at a predetermined position on a substrate in this manner is called an inkjet method.
- an apparatus provided with a mechanism for discharging a nozzle hole liquid is called an ink jet head.
- the inkjet head has a nozzle plate, a nozzle hole penetrating the nozzle plate, a pressure chamber in contact with the surface of the nozzle plate opposite to the liquid ejection surface, and a mechanism for generating pressure in the pressure chamber communicating with the nozzle hole. ing. Then, by applying a pressure to the pressure chamber, the liquid held in the pressure chamber is discharged to the outside of the nozzle hole force nozzle plate.
- FIG. 10 is an overall schematic diagram of an ink jet printer.
- the ink-jet printer 100 shown in FIG. 10 includes an ink-jet head 101 that performs recording by utilizing the piezoelectric effect of a piezoelectric element.
- the ink droplets ejected from the ink-jet head are landed on a recording medium 102 such as paper to form a recording medium. It is for recording.
- the inkjet head is arranged in the main scanning direction X.
- the carriage 104 is reciprocated in the main scanning direction X as the carriage 104 reciprocates along the carriage shaft 103.
- the ink jet printer includes a plurality of rollers (moving means) 105 for relatively moving the recording medium in the sub-scanning direction Y perpendicular to the width direction (X direction) of the ink jet head 101.
- the ink jet head includes a nozzle plate having a nozzle hole for discharging ink, a driving portion for discharging ink from the nozzle, and a portion for supplying ink to the nozzle.
- FIGS. 11A to 11C show an example of the structure of an ink jet head.
- FIG. 11A is a sectional view of the nozzle hole 121 and its vicinity.
- the nozzle hole communicates with the pressure chamber 113, and a vibration plate 112 and a piezoelectric element 111 are formed above the pressure chamber 113.
- the pressure chamber 113 is filled with ink, and the ink is supplied from the ink channel 115 through the ink supply hole 114.
- a voltage is applied to the piezoelectric element 111, the piezoelectric element 111 and the diaphragm 112 bend, the pressure in the pressure chamber 113 increases, and ink is ejected from the nozzle 121.
- FIG. 11B is a schematic three-dimensional perspective view taken along the line II of FIG. 11A. Here, only the structure near the two nozzle holes is shown. In fact, many structures with the same structure are arranged in a line.
- the drawing shows a state in which the left piezoelectric element 117 and the vibration plate 112 are bent, and the ink 118 is ejected from the nozzle hole 121 in the direction of the arrow 119.
- one pressure chamber 113 and one piezoelectric element 117 are assigned to each nozzle hole, but the ink flow path 115 for supplying ink is common to many nozzle holes.
- the ink is supplied from the flow path through the ink supply path 114 opened to each pressure chamber 113.
- FIG. 11C is a plan view as viewed from above the nozzle plate.
- nozzle holes 121 there are two rows of nozzle holes 121 arranged at an interval of about 340 m and 40 nozzle rows 121 arranged in a line on the left and right.
- a line 120 surrounding each nozzle indicates the shape of the piezoelectric element on the other side of the nozzle plate, and a broken line 124 indicates the shape of the ink flow path. Since the ink is supplied to the 40 nozzle holes arranged on the left and right sides of one ink flow path, the same color ink is ejected from the 40 nozzle holes on the left and right sides.
- Reference numeral 122 denotes a feeding direction of the base material, and 123 denotes a state in which the nozzles are arranged in two rows.
- Non-Patent Document 1 A representative example in which an ink jet printer is used as an electronic device manufacturing apparatus is shown below.
- a metal colloid is drawn on a printed circuit board by an ink-jet method, thereby forming a circuit pattern of a conductive wire on the printed circuit board.
- Non-Patent Document 1 Usually, in order to form a conductive circuit pattern on a printed circuit board, a metal film is formed on the substrate in advance, and then the force of forming a conductive circuit pattern by the photolithographic method or a resist film is used to form a negative pattern of the circuit on the substrate.
- a method is used in which a conductive circuit pattern is formed in a region where no metal is present by a plating method and then the resist is removed.
- the advantage of using the inkjet method is that a circuit can be formed directly on a printed circuit board without a laborious photolithography process. For this reason, the circuit is formed in a short time, and the manufacturing cost can be greatly reduced.
- the photolithography method requires a photomask (plate) corresponding to the circuit to be manufactured, so when producing a small and large variety of circuits or performing various circuit prototypes, a large number of photomasks are manufactured. Need, which adds time and cost.
- the inkjet method does not require a photomask, so it is suitable for small-quantity multi-product circuit production and circuit prototype production.
- Non-patent document 2 a field-effect transistor
- Non-patent document 3 a display using electoluminescence
- Non-patent document 4 a microlens array
- DNA chips have been widely used as a means for examining human constitution, diagnosing a disease, and how to use a drug from the gene level.
- a DNA chip is used to store thousands and tens of thousands of types of DNA fragments and synthetic oligonucleotides (hereinafter referred to as “DNA probes”! On a predetermined substrate such as a glass substrate or silicon substrate several centimeters square. It is fixed in position and is used to measure the expression of many genes at the same time or to check for the presence of a specific gene.
- a method for producing this DNA chip by an ink jet method has been proposed. That is, the solution in which the DNA probe is dissolved By arranging the body at a predetermined position on the base material by the ink-jet method, it is possible to easily form a DNA chip at low cost (Patent Document 1 below).
- the initial position of the ink jet head and the substrate is determined, and the liquid is ejected while shifting the relative position between the head and the substrate by a predetermined amount, so that the liquid is applied to the substrate. It is arranged at a predetermined position. If the pattern of the droplet to be drawn is several hundred meters, it can be drawn accurately by this method. However, the initial position and the amount of movement between the inkjet head and the substrate vary in the range of m due to the effect of the substrate fixing method and the thermal expansion of the substrate due to temperature changes. It is difficult to draw this pattern.
- the force nozzle hole may be clogged and the liquid may not be ejected.
- Patent Document 2 proposes a spotting device that can fix a reactant at a specific position of a detection unit.
- a liquid crystal is accurately placed on a substrate by recognizing the position of the substrate by a visual camera placed obliquely above the substrate on which the droplet is placed.
- a DNA probe solution ejection method includes an inkjet head having a plurality of nozzles for ejecting a DNA probe solution, and a means for generating a drive signal for ejecting a liquid with a predetermined nozzle force to the head.
- An apparatus has been proposed, which includes a light projecting unit for projecting light toward a solution discharged from the nozzle, and a light receiving unit for receiving light from the projecting unit. The direction of the emitted light is parallel to the ejection surface of the inkjet head, and it is checked whether the solution is normally ejected by receiving the light reflected on the liquid ejected from the head.
- Patent Document 4 when an organic layer is formed by discharging a liquid-phase organic material onto pixels on a substrate by an inkjet method, (a) an image recognition pattern is formed on the substrate in advance, b) Recognizing the image recognition pattern by an image recognition device to obtain positional information of a substrate or a pixel, and (c) obtaining an ink jet based on the positional information of the substrate or the pixel.
- a method of manufacturing an organic electroluminescent display device which comprises controlling the timing of the ejection head and the position of the substrate or pixel and the timing of discharging the liquid organic material.
- This document discloses a method in which a pixel recognition device is fixed to the back side of a substrate with respect to an inkjet head and recognizes an image recognition pattern through a transparent or translucent substrate.
- the arrangement position of the image recognition device with respect to the substrate and the illumination light required for recognizing the image are disclosed.
- Patent Document 4 since the visual camera is arranged on the back side of the substrate with respect to the ink jet head, even if the distance between the ink jet head and the substrate is small, the area of the substrate where the droplets are to be arranged is observed. It is possible to do. By the way, in order for a visual camera to recognize the position of an ink jet head or a substrate, it is necessary to use a light source to irradiate light to the ink jet head or the substrate, and make the reflected light incident on the visual camera. In No. 4, there is no disclosure on how to arrange the light sources. Generally, a method of placing a light source between a visual camera and a substrate is used.
- Patent Document 1 US Patent No. 5,658,802
- Patent Document 2 JP-A-2003-98172
- Patent Document 3 JP-A-2002-253200
- Patent Document 4 JP 2001-284047 A
- Non-patent literature l G.G.Rozenberg, Applied Physics Letters, 81, 2002, P5249-5251
- Non-patent document 2 H. Sirringhaus et al., Science, 2000, 290, P2123-2126
- Non-Patent Document 3 J. Bharathan et al., Applied Physics Letters, vol. 72, 1998, P2660-2662
- Non-Patent Document 4 TRHebner et al., Applied Physics Letters, vol. 72, 1998, P519-521
- the present invention provides a droplet arrangement that can accurately adjust the relative position between an inkjet head and a substrate even when the distance between the inkjet head and the substrate is short, and further, can observe the state of droplet ejection.
- Provide equipment Further, a method is provided for accurately placing a droplet on a substrate.
- the droplet placement apparatus of the present invention includes an inkjet head, a substrate for receiving droplets ejected from the inkjet head, and irradiating the substrate with light from or near a nozzle hole of the inkjet head.
- a droplet dispensing device comprising: a reflecting device; a position moving device for controlling a relative position between the ink jet head and the substrate; and a control device for discharging liquid from the ink jet head.
- a light receiving element for recognizing the position of the ink jet head is arranged behind the substrate as viewed from the ink jet head.
- the substrate has such a transparency that irradiation light or reflected light directed toward the substrate from at least the nozzle hole or the periphery thereof enters a light receiving element, and the light receiving element is disposed on the substrate from the nozzle hole or the periphery thereof. It is characterized by detecting the irradiation light or reflected light directed to it.
- the droplet disposing method of the present invention is a method of disposing the liquid on the substrate surface by discharging a liquid of an ink jet head, wherein a light receiving element is disposed on a liquid discharging side of the ink jet head. Disposing the substrate between the inkjet head and the light receiving element, measuring the position of the inkjet head with the light receiving element before discharging the liquid, and determining the position of the inkjet head and the substrate based on the measured information; A relative position is determined, and the liquid is arranged on the substrate.
- FIG. 1 is a schematic diagram showing a droplet placement device according to Embodiment 1 of the present invention.
- FIG. 2 is a schematic diagram showing a relationship between a substrate and a light receiving element of the droplet placement device according to the first embodiment of the present invention.
- FIG. 3A is a schematic diagram showing a droplet placement device according to Embodiment 2 of the present invention
- FIG. 3B is a bottom view of the ink jet head of FIG. 3A.
- FIG. 4 is a schematic diagram showing a droplet placement device according to Embodiment 3 of the present invention.
- FIG. 5 is a schematic diagram showing a droplet placement device according to Embodiment 3 of the present invention.
- FIG. 6 is a schematic cross-sectional view showing an inkjet head according to Embodiment 3 of the present invention.
- FIG. 7 is a schematic diagram showing a state in which light emitted from nozzle holes of an ink jet head according to a third embodiment of the present invention is received by an optical sensor.
- FIG. 8 is a schematic diagram showing a droplet placement device according to Embodiment 1 of the present invention.
- FIG. 9 is a schematic diagram showing details of a light reflection unit and a light receiving element of the droplet placement device according to the first embodiment of the present invention.
- FIG. 10 is a schematic view showing an entire conventional ink jet printer.
- FIGS. 11A to 11C are schematic diagrams showing an ink jet head which also uses a conventional force and is also used in Embodiment 1 of the present invention.
- FIG. 11A shows an ink jet head near a nozzle hole.
- FIG. 11C is a schematic cross-sectional view, a schematic three-dimensional perspective view taken along the line II in FIG. 11A, and
- FIG. 11C is a schematic view of the inkjet head viewed from the nozzle plate side.
- the droplet placement device of the present invention includes a light receiving element that is located behind the substrate as viewed from the inkjet head and that recognizes the position of the inkjet head. Further, the substrate has such a transparency that irradiation light or reflected light directed toward the substrate from at least the nozzle holes of the ink jet head or the periphery thereof enters the light receiving element. The higher the transparency, the better the power. The nozzle hole or its peripheral force should be sufficiently transparent so that the light receiving element can detect the irradiation light or reflected light directed to the substrate.
- the substrate it is preferable to use a glass substrate, or a transparent resin such as a polyester film substrate, a polyimide film substrate, an acryl resin substrate, or a polyolefin substrate.
- the substrate may be fixed to a separately provided fixing table.
- the fixed base moves, it is preferable that the light receiving element also moves integrally with the fixed base.
- a translucent reflector for light is provided between the fixed base and the light receiving element, and the light parallel to the surface of the substrate fixed to the fixed base is provided.
- the light source is arranged so that light is incident on the reflector, and the arrangement of the reflector reflects a part of the incident light in the direction of the ink jet head, and the light emitted from the ink jet head is emitted from the light source. It is preferable that a part is adjusted to be transmitted to the light receiving element side.
- the ink jet head force may include a nozzle hole for discharging a liquid, a pressure chamber for generating a pressure for discharging the liquid from a nozzle, and the pressure chamber for the liquid.
- the container is made of a material and has a mechanism for allowing a light source to enter the container.
- the method of arranging liquid droplets on a substrate is a method of arranging the liquid on a substrate surface by ejecting a liquid from an inkjet head, wherein a light receiving element is provided on a liquid ejection side of the inkjet head. And further, a front end is disposed between the inkjet head and the light receiving element. Before disposing the substrate, the position of the inkjet head is measured by the light receiving element before discharging the liquid, and the relative position between the inkjet head and the substrate is determined based on the measured information, and Is disposed on the substrate.
- the droplet moving device of the present invention By using the droplet moving device of the present invention, an electronic device or a high-density DNA chip can be accurately manufactured. Further, since an arithmetic circuit for deriving a relative position between the optical system and the ink jet head and the substrate is simple, the size of the apparatus can be reduced and the price can be reduced.
- FIG. 1 is a schematic diagram showing an example of the liquid placement device of the present invention.
- the ink jet head 1 also discharges the droplet 2 toward the substrate 13 as shown by an arrow 3, and the droplet 2 is arranged at a predetermined position on the fixed substrate 13.
- the inkjet head 1 is fixed to a carriage 4, and the carriage 4 moves along the carriage axis 5 in the X-axis direction.
- the ejection control circuit 9 controls the timing of ejecting the droplet 2 from the inkjet head 1, the size of the droplet 2, the initial speed, and the number of droplets 2 ejected per second.
- the substrate 13 is disposed directly above the light receiving element 6, and the substrate 13 and the light receiving element 6 are integrally moved in the Y-axis direction by the moving stage 7 that moves along the carriage shaft 8.
- the substrate 13 is preferably made of a material having optical transparency.
- the carriage shaft 8 and the moving stage 7 move while being controlled by the position control circuit 10, respectively.
- Information on the intensity of the light incident on the light receiving element 6 and the incident position is input by the light receiving element signal processing circuit 11.
- FIG. 2 which will be described later, there is a nozzle hole for ejecting liquid droplets and a mechanism around the nozzle hole.
- the emitted light is incident on the light receiving element, so that the ink jet head 1 and the light receiving element 6 shown in FIG.
- the positional relationship and the positional relationship between the substrate 13 and the light receiving element 6 can be determined using this light. Further, from these two pieces of information, the positional relationship between the inkjet head and the substrate can be known.
- a mechanism is provided for emitting the nozzle hole and its surrounding light toward the light receiving element. Therefore, it is necessary to provide a large gap between the light receiving element 6 and the substrate 13 for the light source.
- the distance between the substrate 13 and the light receiving element 6 can be reduced, and a large-scale optical system is not required. Therefore, it is possible to move the substrate 13 and the light receiving element 6 integrally. As a result, even if the ink jet head 1 and the substrate 13 move at the same time, the relative positional relationship between them can be derived using a simple arithmetic circuit.
- the position control circuit 10, the light receiving element signal processing circuit 11, and the ejection control circuit 9 are totally controlled by a computer 12.
- the positional relationship between the ink jet head 1 and the substrate 13 is checked by the light receiving element 6, and based on this information, the ink jet head 1 and the substrate 13 are moved to a predetermined position, and the droplet 2 is discharged.
- the droplet 2 can be accurately arranged at a predetermined position on the substrate 13. Further, since the liquid droplet 2 discharged from the nozzle hole can be observed by the light receiving element 6, the discharge state of the liquid droplet 2 can be checked.
- the light receiving element 6 is one in which optical sensors that sense light are arranged in a two-dimensional plane, and measures the intensity of light incident on each sensor.
- optical sensors that sense light are arranged in a two-dimensional plane, and measures the intensity of light incident on each sensor.
- Representative examples include a charge-coupled device (CCD) image sensor and a metal oxide semiconductor (MOS) image sensor.
- FIG. 2 is a schematic diagram illustrating only the substrate 13 and the light receiving element 6 of the droplet arrangement device of FIG. 1 in detail.
- Each optical sensor 16 is held by an optical sensor support 17 and is arranged in a grid in a plane.
- light energy is converted into electron energy in the optical sensor 16 to generate a current.
- the current generated in each element enters the light receiving element signal processing circuit 18 where it is amplified and arithmetically processed.
- the light receiving element signal processing circuit 18 outputs information on the position of the light sensor 16 that has received the light and the intensity thereof as an electric signal to an external output. By processing the output electric signal by the computer 19, information on the light incident on the optical sensor 16 (light receiving element) can be obtained.
- the objective lens 20 is placed above the optical sensor 16, the distance between them is adjusted, and if the image of the inkjet head above the optical sensor 16 is focused on the optical sensor, the position of the inkjet head and each optical sensor 16 can be adjusted.
- Reference numeral 15 denotes the entire light receiving element.
- the positional relationship between the inkjet head and the substrate can be examined by using the following method. That is, after the focus of the nozzle hole image of the ink jet head is positioned on the optical sensor to derive the positional relationship between the nozzle hole and the image sensor, the image of the substrate is similarly focused on the image sensor. The positional relationship between the substrate and the image sensor is derived. From these two pieces of information, the positional relationship between the nozzle hole and the substrate can be derived.
- Embodiment 2 shows one method of emitting light from a nozzle hole or a periphery of a nozzle of an inkjet head. That is, in the first embodiment, a translucent reflector S is provided for the light between the fixed base and the light receiving element, and the light parallel to the surface of the substrate fixed to the fixed base is reflected. A light source is arranged so as to be incident on the plate, and the arrangement of the reflection plate reflects part of the incident light in the direction of the ink jet head and receives part of the light emitted from the ink jet head. It is adjusted to transmit light to the element side.
- FIG. 3A is a schematic diagram showing an example of the present embodiment.
- An optical unit 27 having a reflection plate 28 therein is provided directly below a transparent substrate 23.
- the reflecting plate 28 is translucent to light, and the incident light 24 entering parallel to the surface of the substrate 23 is reflected by the reflecting plate 28 to become a reflected light 25 directed toward the ink jet head 21.
- the reflected light 25 is reflected by the nozzle plate 33 and the substrate 23 to become reflected light 26, passes through the reflecting plate 28, passes through the objective lens 30, and forms an image of the nozzle plate 33 and the substrate 23 with the optical sensor 31.
- 32 indicates an optical sensor support, and 29 indicates the entire light receiving element.
- FIG. 3B is a bottom view of the ink jet head 21 of FIG. 3A, and shows a nozzle plate 33 having a plurality of nozzle holes 22.
- Embodiment 3 shows another method of radiating light toward the light receiving element around the nozzle hole. That is, the third embodiment provides an ink jet head having a mechanism for emitting light toward the substrate from the nozzle hole cover.
- the inkjet head includes a nozzle hole for discharging a liquid, a pressure chamber for generating a pressure for discharging the liquid by a nozzle force, a flow path for supplying the liquid to the pressure chamber, a container for storing the liquid, and the container.
- a tube force for transporting the liquid from the flow path to the flow path is also configured.
- the surface of the ink jet head that contacts the liquid is made of a material that reflects light, and a light source is provided in the container. There is a mechanism to enter.
- FIG. 4 shows an example of a droplet placement apparatus using the inkjet head described in the present embodiment. It is a schematic diagram.
- Light 35 is emitted from a nozzle hole of the inkjet head 34 toward a transparent substrate 36.
- the irradiated light 35 enters the optical sensor 39 through the objective lens 38, so that the positional relationship between the nozzle hole and the light receiving element can be derived.
- the position information of the substrate 36 can be derived by the optical sensor (light receiving element) 39.
- Numeral 40 denotes an optical sensor support
- numeral 37 denotes an entire light receiving element.
- FIG. 5 shows another example of detecting the positions of the inkjet head 41 and the substrate 43 by emitting light 42 from the nozzles of the inkjet head 41.
- This is basically the same as Fig. 4, but this example is characterized in that there is no objective lens.
- 46 denotes an optical sensor support
- 44 denotes the entire light receiving element.
- FIG. 6 is a schematic diagram specifically showing the structure of the ink jet head 51 used in the present embodiment.
- the inner wall of the nozzle hole 55 formed in the nozzle plate 54, the inner wall of the pressure chamber 56, the inner wall of the ink passage 57, the inner wall of the tube 59, and the inner wall of the liquid storage container 61 are made of a material that reflects light. .
- a metal having a high light reflectance may be deposited or plated on each inner wall.
- the metals used include aluminum, platinum, gold and the like.
- the light source 62 When the light source 62 is installed in the liquid storage container 61 and emits light, the light beam 60 emitted from the light source is transmitted through the inner wall of the tube 59, the inner wall of the ink passage 57, the inner wall of the pressure chamber 56, and the inner wall of the nozzle hole 55. The light is reflected and finally emitted outward from the nozzle hole 55 to become emission light 63.
- the light source 62 does not necessarily need to be provided in the liquid storage container 61.
- the light source 62 may be provided outside the container and light may be introduced into the container through an optical fiber.
- 52 is a piezoelectric element
- 53 is a vibration plate
- 58 is an ink supply port.
- FIG. 7 is a diagram schematically showing the shape of a light beam emitted from 64 nozzle holes.
- the shape of the nozzle hole 64 passing through the nozzle plate 63 is symmetric with respect to the central axis passing through the center of the nozzle hole 64
- the light beam 65 emitted from the nozzle hole 64 is symmetric with respect to the central axis of the nozzle hole 64. It becomes. Therefore, when this light beam 65 is projected on the assembly surface of the optical sensor 67, it becomes a circular spot 66. Since the force directly above the center point of the circular spot 66 coincides with the center of the nozzle hole 64, the center position of the nozzle hole 64 can be detected.
- the liquid was placed on a glass substrate with a size of 10 mm (length), 10 mm (width), and 0.2 mm (thickness) in a circle with a diameter of 50 m at intervals of 100 m. Details are shown below.
- a quartz glass substrate having a length of 10 mm, a width of 10 mm, and a thickness of 0.2 mm was ultrasonically cleaned with a neutral detergent and then washed with running pure water.
- the glass substrate was blown with nitrogen gas and dried, and then irradiated with ultraviolet rays in an ozone atmosphere at 110 ° C. to remove organic substances remaining on the surface of the glass substrate.
- alignment marks (alignment marks) of chromium were formed at the four corners of the glass substrate using a normal photolithography method.
- the alignment mark formed a cross shape in which two rectangles of 100 m in length and 10 m in width intersect at right angles.
- a pattern of a positive resist film was formed on the glass substrate.
- This pattern is a grid of 50 m diameter circular resist films arranged at 100 intervals.
- the positional relationship between the alignment marks formed on the four corners of the glass substrate and the circles was set at a predetermined value. That is, if the positions of the alignment marks at the four corners are known, the position of the predetermined circle is uniquely reduced.
- CF (CF) CHSiCl hexadecafluoroethyl trichlorosilane
- the glass substrate was immersed in a mixed solution of xadecane and black form (8: 2 by volume) for 1 hour. Thereafter, the glass substrate was washed with toluene. As a result, FACS was adsorbed to the region where there was no resist.
- the treated glass substrate was also taken out of the glove box, and immersed in acetone to remove the resist film on the glass substrate. Since the FACS adsorbed on the glass substrate was not removed by acetone immersion, only the area where the resist was removed became hydrophilic. As a result, a circle having a diameter of 50 ⁇ m, which is a hydrophilic region, was arranged at intervals of 100 ⁇ m, and a hydrophilic Z water-repellent pattern was formed in which water was repelled outside the hydrophilic region. The static contact angles of pure water in the water-repellent region and the hydrophilic region were 5 degrees and 130 degrees, respectively.
- the specifications are as follows.
- the size occupied by one optical sensor and its surroundings is 60 m in length and 60 m in width.
- the size of the whole sensor is vertical: i5mm , horizontal: 15mm
- the general inkjet head shown in FIGS. 11A-B was used.
- the diaphragm was made of copper with a thickness of 3 ⁇ m
- the piezoelectric element was made of lead zirconate titanate (PZT) with a thickness of 3 m.
- PZT is formed by the vacuum sputtering method and is oriented (001) in the vertical direction of the film.
- the nozzle plate has been subjected to a water-repellent treatment.
- the diameter of the nozzle hole is 20 m, and it is formed by the discharge power method.
- the number of nozzles that eject the same color ink is 40, and these are arranged at an interval of 340 ⁇ m on the left and right.
- the rows of 40 nozzles are vertically arranged in five rows at intervals of 170 ⁇ m. There are a total of 200 nozzle holes.
- the liquid was discharged using only one nozzle hole.
- the liquid was ejected by applying a voltage having a frequency of ⁇ and an amplitude of 20 V between the piezoelectric elements.
- the liquid volume was 20 picoliters (radius about 16.8 m).
- a predetermined liquid was put in the inkjet head instead of the ink.
- FIG. 8 is a conceptual diagram of the liquid drop arranging apparatus of the present embodiment, which is the same as the liquid drop arranging apparatus shown in FIG. 1 except that a light reflecting unit 73 and a light source 83 are provided.
- a light receiving element 74, a light reflection unit 73, and a glass substrate 72 are sequentially installed on a moving stage 75, and the moving stage 75 moves in the Y-axis direction along a carriage shaft 76.
- the inkjet head 71 moves on the carriage shaft 78 in the X-axis direction together with the carriage 77.
- the distance between the nozzle plate of the inkjet head 71 and the glass substrate 72 was set to 0.3 mm.
- incident light 84 parallel to the surface of the glass substrate 72 from the light source 83 is introduced into the light reflection unit 73.
- a halogen lamp was used as a light source.
- 79 is a light receiving element signal processing circuit
- 80 is a position control circuit
- 81 is a discharge control circuit
- 82 is a computer.
- FIG. 9 is a schematic diagram illustrating the structures of the light receiving element and the light reflection unit in detail.
- Light reflection The knit 91 is provided with a reflector 92 that reflects light.
- the reflecting plate 92 is semi-transparent to light, reflects a part of the incident light 93 parallel to the surface of the glass substrate to become a reflected light 94, and transmits part of the light as it is.
- the reflected light 94 reaches a nozzle plate (not shown) of an ink jet head (not shown) through a glass substrate (not shown) provided on the upper portion, returns to the reflecting plate as reflected light. Part of this light enters the light receiving element 97.
- the light receiving element 97 is composed of a CCD, which is an aggregate of optical sensors 96, and an objective lens 95 provided above the CCD. The distance between the objective lens 95 and the CCD is controlled by an electromagnetic motor.
- FITC fluorescein isothiocyanate
- the objective lens (95 in FIG. 9) and the CCD are adjusted so that the image of the alignment mark on the surface of the glass substrate 72 is focused on the CCD element 74. Adjusted the distance. As a result, the positional relationship between the alignment mark and the CCD element could be derived.
- the objective lens was moved so that the image of the nozzle hole that discharges the liquid on the nozzle plate was aligned with the CCD element, and the positional relationship between the nozzle hole and the CCD element was derived.
- the positional relationship between the respective hydrophilic regions on the glass substrate 72 and the nozzle holes could be derived.
- the positions of the inkjet head 71 and the glass substrate 72 were moved so that the nozzle hole for discharging the liquid was directly above the hydrophilic region on the glass substrate 72 on which the liquid was arranged.
- droplets were ejected from the inkjet head 71 by the control circuit 81.
- the inkjet head 71 was moved to place the liquid in the next hydrophilic region.
- the arrangement of the droplets from the ink jet head 71 on the substrate could be observed on the spot using the light receiving element, the light receiving element signal processing circuit 79, and the computer 82.
- the light receiving element signal processing circuit 79 By focusing on the image of the nozzle hole, it was possible to observe how the nozzle hole liquid was ejected. As a result, discharge and non-discharge of liquid from the nozzle hole can be observed on the spot. Do you get it.
- the shape of the arranged droplets can be evaluated by observing the fluorescence with a fluorescence microscope.
- a glass substrate was irradiated with a laser beam having a wavelength of 400 nm, and fluorescence at 520 nm was observed.
- Droplets were arranged in the same manner as in Example 1. However, the ink jet head was as follows.
- the ink jet head having the structure shown in FIG. 6 of Embodiment 3 was used.
- a halogen lamp was used as a light source.
- the inner wall of the head was formed by vacuum deposition of aluminum.
- the focus of the nozzle hole for emitting light was adjusted to the CCD element surface, and the positional relationship between the nozzle hole and the image sensor was derived.
- the inkjet head, the substrate, and the image sensor were moved so that light emitted from the nozzle holes hit the alignment marks on the substrate. Note that the substrate and the image sensor were moved integrally.
- the focus of the image of the alignment mark on the substrate was matched to the CCD element, and the positional relationship between the alignment mark and the imaging element was derived. Based on the information on these two positional relationships, the positional relationship between the nozzle hole and the substrate was derived. Thereafter, based on this information, a droplet was placed in a hydrophilic area on the substrate.
- the droplets arranged on the glass substrate were evaluated in the same manner as in the example. As a result, as in Example 1, force fluorescence was emitted in an area within a circle having a diameter of 50 m, and it was confirmed that the areas were arranged at intervals of 100 m.
- Example 2 Droplets were placed on a glass substrate as in Example 2. However, the objective lens was removed from the image sensor. Then, the CCD element was brought into contact with the glass substrate. [0051] As in Example 2, the relative position between the nozzle hole and the substrate was derived, and the droplet was placed at a predetermined location. As a result, as in Example 2, it was confirmed that the droplets were accurately arranged at predetermined positions.
- a fine droplet pattern can be accurately formed on a substrate.
- semiconductor elements such as DNA chips, biochips, thin-film transistors, lenses, and wiring can be formed. Therefore, according to the present invention, a DNA chip, a biochip, an electronic element, and the like can be realized.
- a piezoelectric element is used as the pressure generating mechanism of the ink jet head.
- the present invention is not limited to this.
- a method of instantaneously generating bubbles by a thermal action Pubble Jet (registered trademark) method) You can use!
- the force of only one nozzle hole and the force of discharging a droplet may be simultaneously discharged from a number of nozzle holes! / ⁇ .
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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JP2006519386A JP4642756B2 (ja) | 2004-03-17 | 2005-03-02 | 液滴配置装置及び液滴配置方法 |
US10/568,059 US7628464B2 (en) | 2004-03-17 | 2005-03-02 | Liquid drop placing apparatus and liquid drop placing method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004-077003 | 2004-03-17 | ||
JP2004077003 | 2004-03-17 |
Publications (1)
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WO2005090081A1 true WO2005090081A1 (ja) | 2005-09-29 |
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PCT/JP2005/003514 WO2005090081A1 (ja) | 2004-03-17 | 2005-03-02 | 液滴配置装置及び液滴配置方法 |
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US (1) | US7628464B2 (ja) |
JP (1) | JP4642756B2 (ja) |
CN (1) | CN100488777C (ja) |
WO (1) | WO2005090081A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007111914A (ja) * | 2005-10-18 | 2007-05-10 | Ulvac Japan Ltd | インク塗布装置、吐出ノズルの検査方法及びインクの塗布方法 |
JP2010245446A (ja) * | 2009-04-09 | 2010-10-28 | Disco Abrasive Syst Ltd | 被加工物の切削方法 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US7628464B2 (en) * | 2004-03-17 | 2009-12-08 | Panasonic Corporation | Liquid drop placing apparatus and liquid drop placing method |
JP5439049B2 (ja) * | 2009-06-22 | 2014-03-12 | 株式会社アルバック | 吐出装置及び吐出方法 |
JP2013016398A (ja) * | 2011-07-05 | 2013-01-24 | Sumitomo Chemical Co Ltd | 光学シートの製造方法 |
CA2862582C (en) * | 2012-01-02 | 2020-01-14 | Mutracx B.V. | Inkjet system for printing a printed circuit board |
KR101681189B1 (ko) * | 2015-01-30 | 2016-12-02 | 세메스 주식회사 | 검사 유닛 및 검사 방법, 이를 포함하는 기판 처리 장치 |
KR102026891B1 (ko) * | 2017-02-06 | 2019-09-30 | 에이피시스템 주식회사 | 도포 장치 |
US11123983B2 (en) * | 2018-12-20 | 2021-09-21 | Kateeva, Inc. | Inkjet printer with substrate flatness detection |
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JPH11339642A (ja) * | 1994-12-16 | 1999-12-10 | Canon Inc | 電子薄膜基板の製造装置 |
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JP3325931B2 (ja) * | 1992-11-04 | 2002-09-17 | コニカ株式会社 | 感光材料へのマーキング方法 |
JP3241251B2 (ja) * | 1994-12-16 | 2001-12-25 | キヤノン株式会社 | 電子放出素子の製造方法及び電子源基板の製造方法 |
US5658802A (en) | 1995-09-07 | 1997-08-19 | Microfab Technologies, Inc. | Method and apparatus for making miniaturized diagnostic arrays |
US6494563B2 (en) * | 1997-12-25 | 2002-12-17 | Canon Kabushiki Kaisha | Ink jet element substrate and ink jet head that employs the substrate, and ink jet apparatus on which the head is mounted |
JP2001284047A (ja) | 2000-04-03 | 2001-10-12 | Sharp Corp | 有機エレクトロルミネッセンス表示装置の製造方法 |
JP2002253200A (ja) | 2001-02-28 | 2002-09-10 | Canon Inc | プローブ溶液吐出装置と吐出状態確認方法 |
JP2002286732A (ja) | 2001-03-28 | 2002-10-03 | Canon Inc | プローブ担体の製造に用いられる液体吐出装置、プローブ担体の製造方法、およびプローブ担体製造装置 |
JP2003098172A (ja) | 2001-09-27 | 2003-04-03 | Matsushita Ecology Systems Co Ltd | センサデバイスの製造方法、センサデバイスの製造装置、スポッティング装置、及びスポッティング装置の針管体 |
US6952536B2 (en) * | 2003-10-04 | 2005-10-04 | Hewlett-Packard Development Company, L.P. | Transmissive optical sensing of leading edges of media sheets advanced substantially adjacent to one another |
US7628464B2 (en) * | 2004-03-17 | 2009-12-08 | Panasonic Corporation | Liquid drop placing apparatus and liquid drop placing method |
-
2005
- 2005-03-02 US US10/568,059 patent/US7628464B2/en not_active Expired - Fee Related
- 2005-03-02 JP JP2006519386A patent/JP4642756B2/ja not_active Expired - Fee Related
- 2005-03-02 WO PCT/JP2005/003514 patent/WO2005090081A1/ja active Application Filing
- 2005-03-02 CN CNB2005800007599A patent/CN100488777C/zh not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH11339642A (ja) * | 1994-12-16 | 1999-12-10 | Canon Inc | 電子薄膜基板の製造装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007111914A (ja) * | 2005-10-18 | 2007-05-10 | Ulvac Japan Ltd | インク塗布装置、吐出ノズルの検査方法及びインクの塗布方法 |
JP2010245446A (ja) * | 2009-04-09 | 2010-10-28 | Disco Abrasive Syst Ltd | 被加工物の切削方法 |
Also Published As
Publication number | Publication date |
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CN1839045A (zh) | 2006-09-27 |
US20080158300A1 (en) | 2008-07-03 |
US7628464B2 (en) | 2009-12-08 |
JP4642756B2 (ja) | 2011-03-02 |
CN100488777C (zh) | 2009-05-20 |
JPWO2005090081A1 (ja) | 2008-01-31 |
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